Silver
Csgaylord's entries Page #43
Here's the list of entries submitted by csgaylord — There are currently 1,085 entries total — keep up the great work!
| MSU | Modem Sharing Unit | |
| LCU | Line Control Unit | |
| LADS | Local Area Data Service | |
| KEY | Keyset (multiline phone) | |
| IVDT | Integrated Voice/Data Terminal | |
| IRC | International Record Carrier | |
| IOT | Inter-Office Trunk | |
| VIDF | Vertical Intermediate Distributing Frame | |
| HIDF | Horizontal Intermediate Distributing Frame | |
| HEHO | Head End Hop Off | |
| FGD | Feature Group D | |
| FGA | Feature Group A | |
| FCO | Foreign Central Office | |
| EEHO | Either End Hop Off | |
| EDD | Envelope Delay Distortion | |
| EAS | Extended Area Service | |
| DUV | Data Under Voice | |
| DS-4 | Digital Stream 4 (274.016 mbps) | |
| DS-1C | Digital Stream 1C (3.152 mbps) | |
| DS-1 | Digital Stream 1 (1.544 mbps) | |
| DRTT | Dial Repeating Tie Trunk | |
| DRTL | Dial Repeating Tie Line | |
| DP | Dial Pulsing | |
| DM | Delta Modulation | |
| DISA | Direct Inward Switch Access |
